That's your ego talking. Don't take this sh1t personally, man.
And definitely don't let your ego ruin potential sexual escapades.
I dunno if it's an ego thing, more just a self-respect thing. I'd put my own self-worth above sticking my d*ck in an attractive woman who thinks she's above me.
If you f*ck a girl who rejected you online the minute she acts cheery in RL, you're basically saying "Treat me like s**t and I'll still bone you if you want."
It's different if you say "Yeah, we matched...you ghosted me." and she gets awkward and apologises. But when she's just like "LOL YEH I KNOW. Wanna f*ck?" she's basically offering you sex as a lame consolation prize for being treated like s**t. It sets a precedent for "I can just treat you/men like s**t and then bang them afterwards like nothing happened."
Imagine it was a business deal. If a guy said to you "Your business is pathetic, you're nothing compared to me. But you want to do a deal, shake on it?" would you want to give him your business? I wouldn't.